Lack of Sleep Causes Mental Lapses: Study Ever sleep poorly and then walk out of the house without your keys? Or space out while driving to work and nearly hit a stalled car? A new study led by a UCLA professor is the first to reveal how sleep deprivation disrupts brain cells’

Interrupted Sleep Worse Than Lack of Sleep After a bad night’s sleep, you are not likely to be in the best of moods. But according to a new study led by Johns Hopkins Medicine, your bad mood may be due to lack of quality sleep, rather than not getting enough sleep.